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Dispersion method of friction-induced magnetic nanoparticles in bio-oil

A magnetic nanoparticle, friction-induced technology, applied in the manufacture of magnetic objects, magnetic materials, inductors/transformers/magnets, etc., can solve the problems of stable time and reduce dispersion cost, and achieve the convenience of large-scale production, reduce dispersion cost, and stabilize time. long effect

Active Publication Date: 2018-11-06
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a new type of renewable and clean energy, bio-oil has attracted increasing attention as a substitute for traditional fossil energy. However, how to disperse magnetic nanoparticles in it stably for a long time has not been reported yet.
[0004] Although many achievements have been made in the dispersion of magnetic nanoparticles, there are still some technical problems that need to be solved urgently, such as the dispersion of magnetic nanopowder materials, especially in the renewable oil-phase bio-oil medium system. , How to improve dispersion efficiency, extend stabilization time, simplify dispersion process, reduce dispersion cost, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The surface roughness of the ring and block friction pair materials is 0.05μm and 0.12μm respectively, and the friction contact area is 1000mm 2 ; Add 0.2 parts of β-cyclodextrin to the end-face friction oil box containing 100 parts of bio-oil, rub at room temperature for 20 minutes under load 30N, speed 0.01m / s, and then add 0.01 part of Fe with a particle size of 15nm 3 o 4 Powder particles, ultrasonically treated for 15 minutes, then rubbed for 50 minutes under the conditions of load 100N, speed 0.1m / s, and oil temperature 50°C; then take out the oil sample after rubbing, and centrifuge at 1000rpm for 30 minutes to remove impurities and get well dispersed magnetic nanoparticles in bio-oil dispersions.

Embodiment 2

[0019] The surface roughness of the ring and block friction pair materials are 0.08μm and 0.08μm respectively, and the friction contact area is 1100mm 2 ; Add 3 parts of β-cyclodextrin into the end-face friction oil box containing 100 parts of bio-oil, rub at room temperature for 15 minutes under load 45N, speed 0.02m / s, and then add 0.1 part of Fe powder particles with a particle size of 30nm , sonicated for 10 minutes, and then rubbed for 40 minutes under the conditions of load 120N, speed 0.2m / s, and oil temperature 55°C; then the rubbed oil sample was taken out, centrifuged at 2000rpm for 15min, and impurities were removed to obtain well-dispersed magnetic nanoparticles. Granular bio-oil dispersion.

Embodiment 3

[0021] The surface roughness of the ring and block friction pair materials is 0.10μm and 0.07μm respectively, and the friction contact area is 1200mm 2 ; Add 8 parts of β-cyclodextrin to the end-face friction oil box containing 100 parts of bio-oil, rub at room temperature for 10 minutes under load 60N, speed 0.05m / s, and then add 2 parts of Ni powder particles with a particle size of 20nm , sonicated for 20 minutes, and then rubbed for 30 minutes under the conditions of load 100N, speed 0.3m / s, and oil temperature 60°C; then the rubbed oil sample was taken out, centrifuged at 3000rpm for 10min, and impurities were removed to obtain well-dispersed magnetic nanoparticles. Granular bio-oil dispersion.

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Abstract

The invention discloses a dispersion method of friction-induced magnetic nanoparticles in biological oil. According to the dispersion method, the modification of a dispersion agent on the magnetic nanoparticles is enhanced by controlling factors such as a friction auxiliary material, friction interface roughness and a friction working condition, and the purpose of uniform dispersion in the biological oil is finally achieved. The dispersion method has the advantages of high dispersion efficiency and moderate process condition, and has important application value on dispersion of the nanoparticles in a medium.

Description

1. Technical field [0001] The invention relates to the field of nanometer material science, in particular to a method for dispersing friction-induced magnetic nanoparticles in bio-oil. 2. Background technology [0002] When the size reaches the nanometer level, the physical properties of many materials have changed significantly, and there are obvious "nano effects". Therefore, in order to develop some functional materials with novel properties, nanomaterials have been extensively studied in the past two decades. Due to their unique magnetism, magnetic nanomaterials can be controlled by an external magnetic field, so they have shown great application prospects in the fields of drug delivery, smart carriers, and anti-friction lubrication. [0003] However, due to the high specific surface energy of the nanoparticles and the magnetism of the magnetic particles, the magnetic nanoparticles are very easy to agglomerate, which affects the performance of the nano-effect. For this ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/00H01F41/00
CPCH01F1/0045H01F41/00
Inventor 徐玉福余景源尤涛彭玉斌耿健胡献国
Owner HEFEI UNIV OF TECH
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